The delay puts more pressure on Rep. Kevin Brady, who heads up the Ways and Means committee and is the principal author of the plan. Brady has repeatedly pointed to the week-long Thanksgiving recess as the deadline for the House to pass the bill.

A one-day delay does not sink that possibility. But it highlights divisions within the GOP that could careen the legislation off course.

There are already reports that Republicans may be forced to delay the unveiling even further, possibly into next week, though so far leaders are publicly denying the reports. If this were to happen, said Chris Krueger, an analyst at Cowen Washington Research Group, Trump's stated goal to complete the reform package by Christmas would go out the window.

"

The reason for the delay, however, is the bigger deal than the postponement itself.

Republicans are still attempting to settle key disputes about how to pay for the bill. Included in the discussions are possible changes to 401(k) retirement plans, the elimination of the state and local tax deduction, and at what income a new, top tax rate would kick in.

Republicans allowed the plan to add $1.5 trillion to the deficit over 10 years as part of the recently passed budget. The GOP tax framework would cut around $5 trillion in revenue over the next 10 years, based on analyses of the framework — meaning the tax writers have to find a variety of offsets in the bill by eliminating loopholes, deductions, and tax credits.

Some of those offsets are almost certain to face resistance from interest groups and constituents, making passage of the final plan more difficult. Additionally, some Republican lawmakers members have have expressed concern with proposals related to the state and local (SALT) deduction. The SALT deduction is used primarily by people in high-tax states like California, New York, and New Jersey.